The appropriate selection of standardized tests is integral to establishing an accurate early diagnosis and providing timely treatment to optimize language outcomes in young children. However, clinicians sometimes utilize tests that are not validated for this specific purpose. This applied dissertation was designed to investigate the validity of…

Validity of a measurement refers to appropriate test score meanings, uses, and interpretations (Messick, 1989; Kane, 1992). There are different approaches to validity: an evidentiary aspect of validity is one requiring gathering statistical evidence to evaluate test score meaning. A common approach to validation is comparisons of test score equity…

This study investigated the reliability and validity of the Abbreviated Math Anxiety Scale (AMAS; Hopko, Bare, & Hunt, 2003) and the Math Anxiety Scale -- Revised (MAS-R; Bai, 2009) across race and gender as well as the extent to which race and gender predict learning math anxiety and math evaluation anxiety at both the secondary level, which…

In Saudi Arabia, mathematics is an essential subject for all freshmen except students majoring in medical sciences. The struggle of students in mathematics is one of the most common issues in the last ten years (Khoshaim, 2015). According to Higbee and Thomas (1999), mathematics self-efficacy, along with other effective characteristics such as…

Central Venous Catheterization (CVC) is a commonly performed medical procedure used for medication delivery to the heart. While CVC is conducted over 5 million times annually it is plagued with high complication rates, resulting in adverse effects on patients, and in the worst cases, death. These complications are directly related to the…

At the highest level, this dissertation is a case study on how bias can become encoded into the tools used to measure a construct and into the very definition of the construct itself. In this case, the construct is spatial ability. This dissertation focuses on the validity and accuracy of spatial tests and illuminates gender bias that is…

Autism Spectrum Disorder (ASD) is diagnosed using the same criteria for males and females (e.g., DSM-5, ICD-10). Our understanding of ASD, including its etiology, symptom presentation, and prevalence has evolved significantly over time motivating several changes to the diagnostic criteria and the tools with which symptoms are measured. One aspect…

American colleges and universities are agents of individual progress, social change and upward mobility that foster an educated citizenry and a prosperous economic system. The long-term benefits of earning a bachelor's degree are multiple, significant and well documented for graduates, their families and for the public at large. The notion of the…

Motivation is a central variable in science education research. The Science Motivation Questionnaire II (SMQ II) is an instrument designed to measure student motivation to learn science. Nearly all peer-reviewed studies (n = 26) of the SMQ II have used Classical Test Theory frameworks despite known limitations with this approach. The present study…

In view of the potential benefits that computers can bring to older adults, it is advantageous that they acquire a basic understanding of computer function. During the COVID-19 pandemic, it became necessary to register for vaccines online, and this posed a problem for some older adults who were neither knowledgeable in using computers nor had…

Development and use of validated assessments in physics provide insight into student understanding of physics concepts and can be utilized to track student learning across time and instructional strategies. These tools can be used to gauge the efficacy of interventions designed to support students and persistence, and allow instructors to make…

The number of applications to postsecondary institutions continues to increase year over year, and in most cases, the number of applications exceeds the number of students admitted. The use of standardized tests continues to grow to help in these admissions decisions. Due to both high usage rates and the changing demographics of our nation's…

Academic self-efficacy refers to a student's confidence in successfully performing academic tasks at a designated level. Empirical research in US students suggests academic self-efficacy is a positive predictor of university student academic performance and retention, two outcomes that need to be increased in Saudi students. Given the potential…

The Performance Expectations described in the Next Generation Science Standards (NGSS) pose significant challenges for assessment design. Multiple models of assessments, including paper-and-pencil and hands-on based performance assessments, can be utilized to assess student competency while applying scientific and engineering practices, in the…

The fusion of the Internet with instructional design, and curricula delivery methods eliminated transactional distance in online learning. However, distance education (DE) in Nigeria has not aligned its pedagogy to the new reality in technology. The purposes of this non-experimental, predictive, validity study were to determine faculty and…